How much does it cost to fix boiler error code ALL 33?

Typical repair cost for the boiler ALL 33 fault is £150-300 including labour.

ALL 33 High

Boiler Fault Code ALL 33

Also written as ALL33 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code ALL 33 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's internal electronic parts are having trouble talking to each other, which has caused the system to stop working as a safety precaution. (As reported on Sime Murelle HE Regular)

Pick your boiler brand for the ALL 33 fix

Sime ALL 33 1 model

Source

Information for the ALL 33 fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026